Data Visualization
Visualize Petroleum Consumption Data
Line Chart
From the line graph of total petroleum consumption by sectors, we can clearly see the percentge of transportation petroleum consumption has increased from 52% (6,152 trillion Btu) to 70% (26,179 trillion Btu) in 73 years, which is due to the significant increase of automobile usage. The second largest petroleum consumption sector is industrial sector, which increased from 3461 trillion Btu to 9146 trillion Btu over the last 73 years. The third largest petroleum consumption sector is residential sector, which actually decreased from 1107 trillion Btu to 981 trillion Btu. Commercial sector and and electric power sector are the two least petroleum consumption sectors. Commercial sector increased from 735 trillion Btu to 909 trillion Btu, whereas electric power sector decreased from 415 trillion Btu to 243 trillion Btu. Residential sector and electric power sector are the only two sectors which decreased since 1949.
Visualize Coal Consumption Data
Choropleth Map
The coal consumption dataset has American states’ coal consumption information from 2001. The unit of the coal consumption is in short tons, a unit of weight equal to 2,000 pounds.
Each state has different sector of coal consumption, such as electric utility, electric power, independent power producers, coke plants, commercial and institutional, IPP CHP, IPP Non-CHP, and other industrial.
The choropleth map above shows the total coal consumption from 2001 to 2021 by state. The animated map shows Texas has been heavily rely on coal as it has the darkest color in the map.
From 2001 to 2010, Texas, Illinois, Pennsylvania, Ohio, and Indiana had fairly darker colors than other states. In 2010, the total coal consumption of Texas was 261 million short tons, Illinois was 163 million short tons, Pennsylvania was 155 million short tons, Ohio and Indiana were both 123 million short tons.
Fortunately, since 2010, we can see the colors of these states but Texas started to get lighter and lighter, which shows they were trying to decrease the coal consumption in all the sectors and use other alternative energy sources to replace coal, which is a good thing.
Facet Graphs
After having a general idea of different states’ coal consumption throughout the years, facet graphs will help us view each states’ coal consumption in detail.
From the facet graphs above, Texas’ coal consumption is way more than other states. Even Texas is trying to reduce their coal consumption every year, the amount of coal they use each year is still really high compared to other states.
Line Chart
The line chart above shows the time series graph of each state’s coal consumption from 2001 to 2021. On average, Texas’ annual coal consumption is around 100 million short tons more than the second most coal using state Illinois.
We can also tell that majority of the states keep their annual coal consumption below 100 million short tons.
Bar Chart
The bar chart above shows the trend of American total coal consumption in the past ten years. As indicates from the choropleth map above, there’s a trend of decrease from 2010. Interestingly, there was an increase trend from 2001 to 2008. There are three major drop which are from 2009, 2012, and 2020.
From this bar graph, we can also tell that, on average, the coal consumption of Texas is about one eighth of the total American coal usage.